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Board Features
21
VL-EPU-4012 Hardware Reference Manual
Table 3: Main Power Connector Pinout
Pin
Signal
Description
Pin
Signal
Description
1
V_MAIN
Main input voltage
(+8V to +30V)
2
V_MAIN
Main input voltage
(+8V to +30V)
3
EARTH_GND
Earth ground
4
V_MAIN
Main input voltage
(+8V to +30V)
5
POWER_FAULT
An open-drain signal
•
Low if power is OK
•
Open if there is a
power fault
(Note)
6
GND
Signal ground
7
GND
Signal ground
8
GND
Signal ground
Note:
A power fault can be due any of the following conditions:
•
The input power is off.
•
The main input regulator has failed.
•
The power input is under- or over-voltage (not in the 8 - 30V range).
Cabling
An adapter cable, part number VL-CBR-0809, is available for connecting the Owl to an ATX
power supply.
If your application requires a custom cable, the following information will be useful:
VL-EPU-4012 Board Connector
Mating Connector
Molex 055959-0830
Molex 051353-0800
Power Requirements
The Owl requires a 8 to +30 VDC supply capable of providing at least 35 W average
power that can also provide a peak power of 50 W. The input DC supply creates both the standby
and payload voltages provided to the CPU module.
The exact power requirements for the Owl depend on several factors, including CPU
configuration (the number of cores, CPU clock rate), memory configuration, peripheral
connections, and attached devices, and others. For example, driving long RS-232 lines at high
speed can increase power demand.
The VersaLogic VL-PS-ATX12-300A is a 1U size ATX power supply suitable for use with the
Owl. Use the VL-CBR-0809 adapter cable to attach the power supply to the main power
connector.
Power Delivery Considerations
Using the VersaLogic approved power supply (VL-PS-ATX12-300A) and power cable
(VL-CBR-0809) will ensure high quality power delivery to the board. Customers who design
their own power delivery methods should take into consideration the guidelines below to ensure
good power connections.
Содержание Owl
Страница 9: ...Introduction 9 VL EPU 4012 Hardware Reference Manual Introduction Figure 1 The Owl VL EPU 4012 ...
Страница 11: ...Introduction 11 VL EPU 4012 Hardware Reference Manual Block Diagram Figure 2 Owl VL EPU 4012 Block Diagram ...
Страница 69: ...Thermal Considerations 69 VL EPU 4012 Hardware Reference Manual Figure 38 Installing the Passive Heat Sink ...